<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>script
    </title>
</head>
<body>
<script>
       var num=1;
       var num1=1.2;
       var num2=NaN;
       var num3="abc";
       var num4=null;
       var num5=undefined;
       var num6;

       document.write(num +"<br>");
     document.write(num1 +"<br>");
    document.write(num2 +"<br>");
       document.write(num3 +"<br>");
       document.write(num4 +"<br>");
       document.write(num5 +"<br>");
       document.write(num6 +"<br>");

  </script>
</body>
</html>